过渡金属络合物催化乙烯齐聚  

Ethylene Oligomerization Catalyzed by Transition Metal Complexes

作　　者：张玉良[1] 钱明星[1] 何仁[1] 

机构地区：[1]大连理工大学精细化工国家重点实验室,大连116012

出　　处：《应用化学》2001年第5期360-364,共5页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金! (2 97730 0 8)

摘　　要：综述了乙烯齐聚的最新成果 ,重点阐述了用于乙烯齐聚的新型催化剂 .讨论了烯烃高聚与齐聚催化剂的关系 .烯烃高聚与齐聚的反应机理相同 ,差别主要在于烯烃插入与β-H消除反应的速率 .第 副族金属络合物主要催化乙烯齐聚 ,第 副族金属主要催化乙烯高聚 ;改变茂金属催化体系的助催化剂和反应条件可得到齐聚产物 .选择体积较小配体的第 族金属络合物 ,有利于Recent achievements in ethylene oligomerization by using transition metal complexes as catalysts are reviewed with emphases on the description of novel catalyst systems. The relationship between the behavior of catalysts in oligomerization and polymerization has been discussed. The oligomerization and polymerization of ethylene have readily identifiable mechanistic feature, difference is the rate of insertion and β -H elimination. M 4+ (M=Ti,Zr) complexes mainly catalyze ethylene oligomerization, and M 3+ (M=Ti,Zr) complexes catalyze polymerization. Altering the cocatalyst composition of group ⅣB metallocene catalyst systems and reaction conditions leads to oligomerization of ethylene. Group Ⅷ complexes with small volume of ligands favor the β -H elimination and oligomerization.

关 键 词：乙烯 齐聚 过渡金属络合物 均相催化 催化剂 聚乙烯 

分 类 号：O632.12[理学—高分子化学] O643.36[理学—化学]